<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
		  <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item)">
		    <view class="goods-name">{{item.goods_name}}</view>
		    <uni-icons type="arrowright" size="16"></uni-icons>
		  </view>
		</view>
		<!-- 搜索历史 -->
		<view class="history-box" v-else >
		  <!-- 标题区域 -->
		  <view class="history-title">
		    <text>搜索历史</text>
		    <uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
		  </view>
		  
		  <!-- 列表区域 -->
		  <view class="history-list">
		    <uni-tag :text="item" v-for="(item, i) in historys" :key="i" @click="gotoGoodsList(item)"></uni-tag>
		  </view>
		  
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				show: true,
				showSync: true,
				searchVal: " ",
				 // 延时器的 timerId
				 timer: null,
				 // 搜索关键词
				 kw: '',
				 searchResults: [],
				 historyList: ['a','app','apple']
				 
			}
		},
		computed: {
			historys(){
				return [...this.historyList].reverse()
			}
		},
		onLoad() {
		 	this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		  },
		methods: {
			input(e){
				 // 清除 timer 对应的延时器
				 clearTimeout(this.timer)
				 
				 this.timer = setTimeout(() => {
					 this.kw= e.value
					 this.getSearchList()
					 console.log(this.kw)
				 }, 500)
			},
			async getSearchList(){
				if(this.kw === ''){
					this.searchResults = []
					return
				}
				// 获取搜索建议列表
				const { data: res} = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
				
				if (res.meta.status !== 200) return uni.$showMsg()
				
				 this.searchResults = res.message
				 this.saveSearchHistory()
			},
			gotoDetail(item){
				uni.navigateTo({
					url: '/subpkg/good_details/good_details?goods_id=' + item.goods_id
				})
			},
			
			saveSearchHistory(){
				// this.historyList.push(this.kw)
				// this.historyList = Array.from(new set(this.historyList))
				 // 1. 将 Array 数组转化为 Set 对象
				  const set = new Set(this.historyList)
				  // 2. 调用 Set 对象的 delete 方法，移除对应的元素
				  set.delete(this.kw)
				  // 3. 调用 Set 对象的 add 方法，向 Set 中添加元素
				  set.add(this.kw)
				  // 4. 将 Set 对象转化为 Array 数组
				  this.historyList = Array.from(set)
				  uni.setStorageSync('kw',JSON.stringify(this.historyList))
				
			},
			cleanHistory(){
				this.historyList = []
				uni.setStorageSync('kw',[])
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?query=' + kw
				})
			}
		}
	}
</script>

<style lang="scss">
	.uni-searchbar{
		display: flex;
		flex-direction: row;
		position: relative;
		padding: 16rpx;
		background-color: #C00000;
	}
   .search-box{
	   position: sticky;
	   top: 0;
	   z-index: 999;
   }
   .sugg-list {
	   padding: 0 5px;
	   .sugg-item{
		    font-size: 12px;
		     padding: 13px 0;
		     border-bottom: 1px solid #efefef;
		     display: flex;
		     align-items: center;
		     justify-content: space-between;
			  .goods-name {
			       // 文字不允许换行（单行文本）
			       white-space: nowrap;
			       // 溢出部分隐藏
			       overflow: hidden;
			       // 文本溢出后，使用 ... 代替
			       text-overflow: ellipsis;
			       margin-right: 3px;
			     }
			 
		   
	   }
   }
   .history-box {
     padding: 0 5px;
   
     .history-title {
       display: flex;
       justify-content: space-between;
       align-items: center;
       height: 40px;
       font-size: 13px;
       border-bottom: 1px solid #efefef;
     }
   
     .history-list {
       display: flex;
       flex-wrap: wrap;
   
       .uni-tag {
         margin-top: 5px;
         margin-right: 5px;
       }
     }
   }
</style>
